28726543 has 2 divisors, whose sum is σ = 28726544. Its totient is φ = 28726542.

The previous prime is 28726531. The next prime is 28726567. The reversal of 28726543 is 34562782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28726543 - 2²¹ = 26629391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28726513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363271 + 14363272.

It is an arithmetic number, because the mean of its divisors is an integer number (14363272).

Almost surely, 2^28726543 is an apocalyptic number.

28726543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726543 is an equidigital number, since it uses as much as digits as its factorization.

28726543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 28726543 is about 5359.7148245033. The cubic root of 28726543 is about 306.2629455586.

The spelling of 28726543 in words is "twenty-eight million, seven hundred twenty-six thousand, five hundred forty-three".